ENERGY SAVING EQUIPMENT
Up on the roof, working quietly and efficiently
Lee Jenkins-Skinner, CIAT AHU and rooftop product manager, highlights the benefits of rooftop air conditioning units and introduces its new Vectios RPJ/RIJ on R-454B range, designed for optimum energy efficiency.
A
ir conditioning is one of the 20 greatest engineering achievements of the 20th century, according to research conducted by the National Academy of
Engineering.1 And its roots go back to 1902, when American engineer Willis Haviland Carrier invented the first modern air conditioning system.
Genius can strike anywhere, and for Carrier it was a foggy
Pittsburgh train platform, where staring through the mist he discovered that he could dry air by passing it through water to create fog.2 This process would make it possible to manufacture air with specific amounts of moisture in it. Within a year, Carrier completed his invention that worked
by sending air through coils filled with cold water, cooling the air and simultaneously removing the moisture to control humidity. This invention became the foundation of modern air conditioning and later earned Carrier the title: The Father of Air Conditioning. Later, in 1933, the Carrier Air Conditioning Company of America developed an air conditioner using a belt- driven condensing unit and blower, mechanical controls, and evaporator coil. This device became the model in the marketplace for air-cooling.3
Air conditioners have come on a long way since then, with huge advances in vapour compression, diagnostics and
controls, electronic sensors, materials and energy efficiency. And we are seeing them appear in more settings and locations today than our industry’s pioneers could ever have imagined. Traditionally, air conditioning units were designed to be installed at ground-level with an outdoor unit, containing the compressor, condenser coil and expansion coil, and an indoor unit, comprising a cooling coil, a blower and an air filter.
While this traditional method is still widely used in commercial buildings today, look skyward and there is a whole new world of potential for air conditioning up on the roof.
Benefits of rooftop units As the name suggests, a rooftop unit (RTU) is a self-contained unit that is normally installed on the rooftop of a commercial building. Like conventional systems, the purpose of RTUs is to distribute conditioned air within defined areas of a building. Connected to ductwork, RTUs provide a defined route for delivery of conditioned air into the occupied space. The technology is popular for retail, logistics and other commercial applications as RTUs are simple, compact, as well
24 January 2023 •
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